Grinding-machine.



F. STUTZMAN.

GRINDING MACHINE.

APPLICATION FILED JUNE 10. 1915.

5 1 9 6 1 V 0 N d e t n e t a P COLUMBIA PLANOGRAPH CID-.WASHINGTON, D. c.

niviran srarns arana orrioa FRANK STUTZMAN, 0F WILLI AMSPORT, PENNSYLVANIA.

GRINDING- Application filed June 10,

To all whom it may concern.

Be it known that I, FRANK STUTzuAN, a citizen of the United States, residing at WVilliamspoi-t, Pennsylvania, have invented certain new and useful Improvements in Grinding-Machines, of which the following is a specification. i

The present invention relates to improvements in grinding machines and pertains more particularly to grinders adapted for use in sharpening the knives of a cylindrical planer head. i

The invention comprises certain novel features in the construction of grinding ma= chines of that general type in which it is not necessary to remove the cylindrical planer head from the planing machine, nor even to remove the several blades from the planer head.

With apparatus such as disclosed in the present invention a set of knives once placed on a machine can be used and not taken off until they are worn out. The knives are thus always maintained in perfect alinement and a great amount of idle machinery is dispensed with.

The object of the present invention is to provide a grinding machine which caneasily be attached to a planer, while the knives on the cylindrical head are sharpened and then removed without the necessity of disassembling any of the parts of the planing machine.

A further object consists in providing a grinding attachment of the type herein referred to, which will be simple and compact in its construction, economic in its cost of production and capable of operation without the use of complex or expensive driving mechanism.

With these and other objects in view, the invention consists in the combination and arrangement of parts more fully set forth in the following specification, illustrated in the accompanying drawings and pointed out in the appended claim.

In the drawings: Figure 1 is a top plan View of the grinding machine. Fig. 2 is a front elevation of same, and Fig. 3 is a side elevation showing the machine attached to a planer.

Referring now to the drawings, the grind ing machine comprises a rectangular frame 1 extending transversely across table of the planer T and adapted to be detachably secured in position by means of the support- MACHINE.

Specification of Letters Patent. Patm tgd; N 16, 19111 1915. Serial No. 33,305.

ing brackets 2, which are bolted or otherwise attached to the table. As shown the rectangular frame 1 is supported in a vertical position at right angles to the upper surface of the planer table T. It is provided at its forward side with an extension or tongue 3 extending throughout its length from side to side and forming a track upon which a slidably mounted carriage 4 moves, being carried by a plate 5 having dovetailed grooves 6 engaging therewith. The carriage 4: consists of a vertically disposed hollow rectangular frame 7 bolted to the plate 5. At the forward edge of the frame 7 a vertically adjustable frame 8 isprovided sliding in dove-tailed grooves 9 of the frame 7. The position of vertical adjustment of the frame8 in relation to the frame 7 is controlled by means of handle 10 provided at the upper end of a shaft 11, carried in a bracket 12 from the frame 7 and having a threaded shank engaging with a suitably formed screw-threaded boss 13 at the upper end of the frame 8. The frame 8 has formed integral therewith a pair of horizontally extending plates 1% which carry the bearings 15 for a shaft 16 loosely mounted there- 'in. The shaft 16 has keyed thereto a pulley wheeel 17 located between the bearings 14 and opposite the rectangular opening of the frame 8. At one end of the shaft 16 an emery wheel 18 is loosely carried between a pair of disks or washers 19, being retained in proper position by a nut 20, screw-threaded on the extreme end of shaft 16.

A pair of rearwardly extending brackets 21 are provided at the back of the main frame 1 and form bearings 22 for a horizontal shaft 23. The brackets 21 are so arranged that the shaft 23 is positioned with its axis parallel to and approximately opposite the center of the rectangular opening in the frame 1. The shaft 23 extends considerably beyond the frame 1 at one end and is provided with, a drive pulley 24 and idle pulley 25, adapted to receive a belt not shown from some suitable source of power. The shaft 23 is provided with metal collars 27 fastened thereto by means of set screws 28. Two of these collars are provided, one on either end of the shaft 23, just inside the bearings 22. The collars 27 have integral flanges 29 perforated around their circumferences, as shown at 30.

Wooden blocks or collars 31 are arranged on the shaft 23, just inside the flanges 3O and are adapted to be coupled thereto by means of screws 32, passing through the perforations 30. A pulley drum 34 or roller is built upon these wooden collars 31, formed of slats or members having their surfaces rounded to present a cylindrical exterior. They are spaced slightly apart to form a substantially barrel-like pulley drum- A belt 33 passes over the pulley drum 34:, extending through the openings in the frames 1, 7 and 8 and around the pulley or Wheel 17 on the shaft 16. 'In order to take up any slack on the belt 33, due to the vertical adjustment of the frame 8, a friction roller 35 is provided and carried on a spring pressed arm 36, extending from the inner side of the opening in the frame 7. The frame 7 is provided with a handle 37, by

' means of which it can readily be slid along the track 3 transversely across the frame 1.

From the foregoing description, it is belleved the operatlon of the grindmg machine will be apparent Porerrsrpphedtotheshdttttlrough a belt. Rotation of the shaft 93 is transmitted through the belt 33 to the shaft 15, carrying the grinding or emery Wheel 18'. It will be understood thatthe lower edge of the heel 18 is normally in contact With the knife edge of the plane blade. The degree of contact can be regulated by manipulating thehandle 10 and varying the vertical adjustment of the frame 8 in frame 7. WVhile the machine is in operation, the position of the carriage 4 along the track 3 can be changed at will, by means of the handle 37. The belt 33 Will easily slip along the surface of the drum pulley 34.

By this arrangement, a compact and efficient grinding machine is provided and one which is comparatively simple in its construction and is capable of being operated with the greatest ease and convenience. No specially driven screw threaded feed shaft is needed and all the extra driving means for such is dispensed with entirely.

What I claim is A grinding attachment for planing machines comprising a stationary frame, a trackway formed thereon, a slidable reciprocating carriage mounted on said trackway, a rotatable grinding wheel mounted on said carriage, a drum pulley mounted on said frame, on the opposite side from said carriage and extending longitudinally across said frame from side to side, power operated means for driving said drum pulley, a belt connecting said grinding Wheel with said drumprllrrmrlrdrptdltorrential 0 versely across the latter as the carriage it moved, and manually operated means for sliding said carriage back and forth across said frame, substantially as described.

In testimony whereof, I have affixed my signature in presence of two witnesses.

FRANK STUTZMAN.

Witnesses:

E. W. SMITH, GEO. B. ALLEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

